Notes:
Hydrocarbon-soluble oligomers were prepared by the acid-catalyzed condensation of alkylanilines with formaldehyde. Highest molecular weight oligomers (MW ∼ 6000) were obtained from alkylanilines prepared by the Friedel-Crafts alkylation of aniline with α-olefins. By NMR, it was shown that the oligomers contain structures corresponding to methylene-linked aromatic rings and methylene linked to both an aromatic ring and a nitrogen atom. The oligomers exhibit very good initial inhibition of metal corrosion in aqueous environment; and the inhibition is more persistent than that observed with monomeric analogs.

Notes:
Summary At the 2nd Surgical Department of the Harburg General Hospital in Hamburg, Germany, 263 patients with infrarenal abdominal aortic aneurysms were operated on during a 5-year period from 1981 to 1985. The film demonstrates diagnostic procedures and evaluation techniques, as employed by the family physician and the clinician. Moreover, operations for two abdominal aneurysms are shown. Postoperative problems, risk factors, and contraindications against operative procedures are discussed.